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- W1990497655 abstract "The first hydrostatic core (FHSC) represents a very early phase in the low-mass star formation process, after collapse of the parent core has begun but before a true protostar has formed. This large (few AU), cool (100 K), pressure supported core of molecular hydrogen is expected from theory, but has yet to be observationally verified. Here we present observations of an excellent candidate for the FHSC phase: Per-Bolo 58, a dense core in Perseus that was previously believed to be starless. The 70 micron flux of 65 mJy, from new deep Spitzer MIPS observations, is consistent with that expected for the FHSC. A low signal-to-noise detection at 24 micron leaves open the possibility that Per-Bolo 58 could be a very low luminosity protostar, however. We utilize radiative transfer models to determine the best-fitting FHSC and protostar models to the spectral energy distribution and 2.9 mm visibilities of Per-Bolo 58. The source is consistent with a FHSC with some source of lower opacity through the envelope allowing 24 micron emission to escape; a small outflow cavity or a cavity in the envelope are both possible. While we are unable to rule out the presence of a protostar, if present it would be one of the lowest luminosity protostellar objects yet observed, with an internal luminosity of approximately 0.01 Lsun." @default.
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- W1990497655 date "2010-09-16" @default.
- W1990497655 modified "2023-09-27" @default.
- W1990497655 title "A CANDIDATE DETECTION OF THE FIRST HYDROSTATIC CORE" @default.
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- W1990497655 doi "https://doi.org/10.1088/2041-8205/722/1/l33" @default.
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